如何使用 2 个独立微调器的输入

Question

我正在尝试构建一个应用程序，该应用程序从 2 个微调器中获取 2 个输入的氧化还原对，以显示有关可以由这些化学物质制成的电池的信息，例如将用作 anode/cathode、各半反应还原电位及细胞等

我的问题是我无法找到任何方法来获取两个微调器的输入以进行计算，只能让两个微调器做同样的事情。

我目前的代码是这样的：

public class MainActivity extends AppCompatActivity implements AdapterView.OnItemSelectedListener{

Spinner spinner1, spinner2;
ArrayAdapter adapter;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    adapter = ArrayAdapter.createFromResource(this, R.array.pairs, android.R.layout.simple_spinner_item);

    spinner1 = (Spinner) findViewById(R.id.spinner1);
    spinner1.setAdapter(adapter);
    spinner1.setOnItemSelectedListener(MainActivity.this);

    spinner2 = (Spinner) findViewById(R.id.spinner2);
    spinner2.setAdapter(adapter);
    spinner2.setOnItemSelectedListener(MainActivity.this);
}



@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
    String choice1 = parent.getItemAtPosition(position).toString();
    double first = 0;
    double second = 0;
    double anode;
    double cathode;
    if (choice1 == getResources().getString(R.string.MnO4)){
        first = 0.60;
        Toast.makeText(parent.getContext(), choice1, Toast.LENGTH_SHORT).show();
    } else if (choice1 == getResources().getString(R.string.Cl)) {
        first = 1.36;
        Toast.makeText(parent.getContext(), choice1, Toast.LENGTH_SHORT).show();
    }
    if (first > second) {
        cathode = first;
        anode = second;
    } else {
        cathode = second;
        anode = first;
    }
    double cellValue = anode - cathode;


}

@Override
public void onNothingSelected(AdapterView<?> parent) {

    }
}

我是 android 工作室的新手，非常感谢您的帮助。谢谢

Answer 1

我建议您使用匿名类来处理 onItemSelected。这样您就可以独立处理每个 Spinner 的选择。

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    adapter = ArrayAdapter.createFromResource(this, R.array.pairs, android.R.layout.simple_spinner_item);

    spinner1 = (Spinner) findViewById(R.id.spinner1);
    spinner1.setAdapter(adapter);
    spinner1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                // Do what you need to do with spinner1 info
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });



    spinner2 = (Spinner) findViewById(R.id.spinner2);
    spinner2.setAdapter(adapter);
        spinner2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                // Do what you need to do with spinner2 info
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

            }
        });
}

现在您可以删除 Override 方法： @Override

public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

你可以移除工具：

implements AdapterView.OnItemSelectedListener

如何使用 2 个独立微调器的输入

How do I use the inputs of 2 separate spinners

android

android-spinner